To cope promptly with fluctuation in production ratio of a common use high performance tire at a low cost by a method wherein a pressing can device is freely detachably attached, and folding back operation of a carcass ply component is made freely selectable between expansion of a side pladder and cooperating operation of the expantion of the pladder and transfer of the pressing can device.

A sub forming drum 6 which winds a belt component or the like in a ring state of a specific circumference length, and a top component holding transfer device 8 which to be applied to a green case which is expanded holding a top component or the like in a shrinked diameter state are positioned to a side opposed to a driving device 3 putting a main forming drum 2 between them. Further, an inside pressing can device 20 has a double acting cylinder 20 and a cylindrical part 22, and is freely transferably detachably attached in a central axial X direction. An outside pressing can device 30 has a double acting cylinder 31, a piston rod 32, and a freely detachable cylindrical part 33, and is easily detachable from a support body 7. Thereby, folding back operation is carried out with the double acting pladder, or folding back operation of a can type can the carried out by cooperating action of the outside pladder with the pressing can device.